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1 /* crypto/bf/bf_locl.org */
2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 /* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
60 *
61 * Always modify bf_locl.org since bf_locl.h is automatically generated from
62 * it during SSLeay configuration.
63 *
64 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
65 */
66
67 /* Special defines which change the way the code is built depending on the
68 CPU and OS. For SGI machines you can use _MIPS_SZLONG (32 or 64) to find
69 even newer MIPS CPU's, but at the moment one size fits all for
70 optimization options. Older Sparc's work better with only UNROLL, but
71 there's no way to tell at compile time what it is you're running on */
72
73 #if defined( sun ) /* Newer Sparc's */
74 # define BF_PTR
75 #elif defined( __ultrix ) /* Older MIPS */
76 # define BF_PTR
77 #elif defined( __osf1__ ) /* Alpha */
78 /* None */
79 #elif defined ( _AIX ) /* RS6000 */
80 /* Unknown */
81 #elif defined( __hpux ) /* HP-PA */
82 /* None */
83 #elif defined( __aux ) /* 68K */
84 /* Unknown */
85 #elif defined( __dgux ) /* 88K (but P6 in latest boxes) */
86 /* Unknown */
87 #elif defined( __sgi ) /* Newer MIPS */
88 # define BF_PTR
89 #elif defined( i386 ) /* x86 boxes, should be gcc */
90 # define BF_PTR2
91 #elif defined( _MSC_VER ) /* x86 boxes, Visual C */
92 # define BF_PTR2
93 #endif /* Systems-specific speed defines */
94
95 #undef c2l
96 #define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
97 l|=((unsigned long)(*((c)++)))<< 8L, \
98 l|=((unsigned long)(*((c)++)))<<16L, \
99 l|=((unsigned long)(*((c)++)))<<24L)
100
101 /* NOTE - c is not incremented as per c2l */
102 #undef c2ln
103 #define c2ln(c,l1,l2,n) { \
104 c+=n; \
105 l1=l2=0; \
106 switch (n) { \
107 case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
108 case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
109 case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
110 case 5: l2|=((unsigned long)(*(--(c)))); \
111 case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
112 case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
113 case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
114 case 1: l1|=((unsigned long)(*(--(c)))); \
115 } \
116 }
117
118 #undef l2c
119 #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
120 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
121 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
122 *((c)++)=(unsigned char)(((l)>>24L)&0xff))
123
124 /* NOTE - c is not incremented as per l2c */
125 #undef l2cn
126 #define l2cn(l1,l2,c,n) { \
127 c+=n; \
128 switch (n) { \
129 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
130 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
131 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
132 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
133 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
134 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
135 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
136 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
137 } \
138 }
139
140 /* NOTE - c is not incremented as per n2l */
141 #define n2ln(c,l1,l2,n) { \
142 c+=n; \
143 l1=l2=0; \
144 switch (n) { \
145 case 8: l2 =((unsigned long)(*(--(c)))) ; \
146 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
147 case 6: l2|=((unsigned long)(*(--(c))))<<16; \
148 case 5: l2|=((unsigned long)(*(--(c))))<<24; \
149 case 4: l1 =((unsigned long)(*(--(c)))) ; \
150 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
151 case 2: l1|=((unsigned long)(*(--(c))))<<16; \
152 case 1: l1|=((unsigned long)(*(--(c))))<<24; \
153 } \
154 }
155
156 /* NOTE - c is not incremented as per l2n */
157 #define l2nn(l1,l2,c,n) { \
158 c+=n; \
159 switch (n) { \
160 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
161 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
162 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
163 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
164 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
165 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
166 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
167 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
168 } \
169 }
170
171 #undef n2l
172 #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
173 l|=((unsigned long)(*((c)++)))<<16L, \
174 l|=((unsigned long)(*((c)++)))<< 8L, \
175 l|=((unsigned long)(*((c)++))))
176
177 #undef l2n
178 #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
179 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
180 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
181 *((c)++)=(unsigned char)(((l) )&0xff))
182
183 /* This is actually a big endian algorithm, the most significate byte
184 * is used to lookup array 0 */
185
186 /* use BF_PTR2 for intel boxes,
187 * BF_PTR for sparc and MIPS/SGI
188 * use nothing for Alpha and HP.
189 */
190 #if !defined(BF_PTR) && !defined(BF_PTR2)
191 #define BF_PTR2
192 #endif
193
194 #define BF_M 0x3fc
195 #define BF_0 22L
196 #define BF_1 14L
197 #define BF_2 6L
198 #define BF_3 2L /* left shift */
199
200 #if defined(BF_PTR2)
201
202 /* This is basically a special pentium verson */
203 #define BF_ENC(LL,R,S,P) \
204 { \
205 BF_LONG t,u,v; \
206 u=R>>BF_0; \
207 v=R>>BF_1; \
208 u&=BF_M; \
209 v&=BF_M; \
210 t= *(BF_LONG *)((unsigned char *)&(S[ 0])+u); \
211 u=R>>BF_2; \
212 t+= *(BF_LONG *)((unsigned char *)&(S[256])+v); \
213 v=R<<BF_3; \
214 u&=BF_M; \
215 v&=BF_M; \
216 t^= *(BF_LONG *)((unsigned char *)&(S[512])+u); \
217 LL^=P; \
218 t+= *(BF_LONG *)((unsigned char *)&(S[768])+v); \
219 LL^=t; \
220 }
221
222 #elif defined(BF_PTR)
223
224 /* This is normally very good */
225
226 #define BF_ENC(LL,R,S,P) \
227 LL^=P; \
228 LL^= (((*(BF_LONG *)((unsigned char *)&(S[ 0])+((R>>BF_0)&BF_M))+ \
229 *(BF_LONG *)((unsigned char *)&(S[256])+((R>>BF_1)&BF_M)))^ \
230 *(BF_LONG *)((unsigned char *)&(S[512])+((R>>BF_2)&BF_M)))+ \
231 *(BF_LONG *)((unsigned char *)&(S[768])+((R<<BF_3)&BF_M)));
232 #else
233
234 /* This will always work, even on 64 bit machines and strangly enough,
235 * on the Alpha it is faster than the pointer versions (both 32 and 64
236 * versions of BF_LONG) */
237
238 #define BF_ENC(LL,R,S,P) \
239 LL^=P; \
240 LL^=((( S[ (int)(R>>24L) ] + \
241 S[0x0100+((int)(R>>16L)&0xff)])^ \
242 S[0x0200+((int)(R>> 8L)&0xff)])+ \
243 S[0x0300+((int)(R )&0xff)])&0xffffffffL;
244 #endif